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| Q. |
Stainless steel is usually made by alloying the steel with – |
| A. | copper and nickel |
| B. | copper and chromium |
| C. | chromium and nickel |
| D. | manganese and copper |
| Answer» C. chromium and nickel | |
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Explanation: In metallurgy, stainless steel is defined as a steel alloy with a minimum of 10.5 per cent to 11 per cent chromium content by mass. There are different types of stainless steels: when nickel is added, for instance, the austenite structure of iron is stabilized. This crystal structure makes such steels virtually non- magnetic and less brittle at low temperatures. For greater hardness and strength, more carbon is added. |
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